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AssigneeNikon Corporation
InventorsTakuro ONO, Kosuke MACHIDA
Estimating the term…
An optical system (OL) includes a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group having negative refractive power, disposed in order from an object along an optical axis, and upon focusing, the second lens group and the fourth lens group move along the optical axis, and the following conditional expression is satisfied: 0. 5 0 < f 1 / f 3 < 2 . 0 0 where f1: a focal length of the first lens group f3: a focal length of the third lens group.
An optical system comprising a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group having negative refractive power, disposed in order from an object along an optical axis, wherein
A method for manufacturing an optical system including a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group having negative refractive power, disposed in order from an object along an optical axis,
Dependencies are inferred from the claim text.